Logical Architecture Diagram

Definition

A logical architecture diagram is a mid-level architecture diagram work product that documents the technology-independent logical architecture of an application.

Objectives

The typical objectives of a logical architecture diagram is to document the:

• Logical components of the layers and partitions of an application (as documented in the layer diagram) including their:
  • Data Components.
  • Software Components (typically major functions).
• Logical relationships between them.

Benefits

The typical benefits of a logical architecture diagram are to:

• It drives the physical architecture.
• It summarizes the overall architecture.

Contents

The typical contents of a logical architecture diagram are:

• Node Icons for:
  • Layers
  • Partitions
  • Logical Software Components
  • Logical Data Components
• Arc Icons for:
  • Logical Relationships

Stakeholders

The typical stakeholders of a logical architecture diagram are:

• Producers:
  • Architecture Team
• Evaluators:
  • Project Manager
  • Technical Leader
• Approvers:
  • Project Manager
  • Technical Leader
  • Customer Representative
• Maintainers:
  • Architecture Team
• Users:
  • Software Development Team
  • Database Team

Phases

• Business Strategy: Not Applicable
• Business Optimization: Not Applicable
• Initiation: Completed
• Construction: Maintained
• Delivery: Maintained
• Usage: Maintained
• Retirement: Archived

Preconditions

Logical architecture diagrams can typially be started if the following preconditions hold:

• The initiation phase has started.
• The architecture team is adequately staffed and trained in logical architecture production.

Inputs

The typical inputs to a logical architecture diagram include:

• Work Products:
  • Application Vision Statement
  • System Requirements Specification
  • Layer Diagram
• Stakeholders:
  • TBD

Guidelines

• TBD

Conventions

Logical architecture diagrams are typically constrained by the following conventions:

• Work Flow
• Content and Format Standard
• Inspection Checklist

Examples

• Example Logical Architecture Diagram